I wonder how many of those visiting self-help seminars or reading books actually improve their akrasia. Are there any studies on this? The more I think and read about this problem the more I get the impression that you can not considerably improve on it. I.e. you are born with a certain amount of self-control which is dictated by your genes and maybe very early environment. The famous Marshmallow experiment seems to confirm this.

EDIT: Oooops I guess I was wrong, I just followed a bit on my own links and noticed that in fact there seems to be hope, some techniques improved anti-akrasia in children: http://www.newyorker.com/reporting/2009/05/18/090518fa_fact_lehrer?currentPage=4